Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden for behavioral disclosure. 'List' implies a read-only operation, which gives some signal, but it doesn't disclose pagination behavior, result sorting, whether it returns empty lists vs errors, or performance characteristics for potentially large workflows. Adequate but thin for a listing tool with zero annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.